Abstract:
:A carcinoembryonic antigen (CEA)-producing human lung cancer cell line (A549), a nonproducing human lung cancer cell line (CADO-LC9), and a human uterine cervical cancer (HeLa) were transfected with the herpes simplex virus thymidine kinase (HSV-TK) gene regulated by 445 nucleotides upstream from the translational start of CEA gene. Fifty % growth inhibitory concentration of ganciclovir (GCV) was 0.57 micron for HSV-TK-transfected A549; relative sensitivity to GCV was more than 1000 times higher compared to the 50% growth inhibitory concentration of the parental cell line. Both CADO-LC9 and HeLa transfected with HSV-TK were still resistant to GCV. There was no difference in either morphology or doubling time between HSV-TK-transfected and parental clones. Injections (i.p.) of GCV resulted in significant regression of HSV-TK-transfected A549 tumors in nude mice. These data show the possibility of gene therapy using the cell type-specific promoter of CEA gene against CEA-producing adenocarcinoma of the lung.
journal_name
Cancer Resjournal_title
Cancer researchauthors
Osaki T,Tanio Y,Tachibana I,Hosoe S,Kumagai T,Kawase I,Oikawa S,Kishimoto Tsubject
Has Abstractpub_date
1994-10-15 00:00:00pages
5258-61issue
20eissn
0008-5472issn
1538-7445journal_volume
54pub_type
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